import random
from django import forms
from web import models
from django.conf import settings
from django.core.validators import RegexValidator
from django.core.exceptions import ValidationError
from utils.tencent.sms import send_sms_single
from django_redis import get_redis_connection
from utils import encrypt
from web.forms.Bootstrap import BootstrapForm
class RegisterModelForm(BootstrapForm,forms.ModelForm):
    mobile_phone = forms.CharField(label='手机号',validators=[RegexValidator(r'^(1[3|4|5|6|7|8|9])\d{9}$','手机号格式错误'),])
    password = forms.CharField(
        label='密码',
        min_length=4,
        max_length=64,
        error_messages={
            'min_length': "重复密码长度不能小于4个字符",
            'max_length': "重复密码长度不能大于64个字符"
        },
        widget=forms.PasswordInput()
    )
    confirm_password = forms.CharField(
        label='确认密码',
        min_length=4,
        max_length=64,
        error_messages={
            'min_length': "密码长度不能小于4个字符",
            'max_length': "密码长度不能大于64个字符"
        },
        widget=forms.PasswordInput()
    )
    code = forms.CharField(label='验证码')

    class Meta:
        model = models.UserInfo
        # fields = "__all__"
        fields = ['username','email','password','confirm_password','mobile_phone','code']



    def clean_username(self):
        username = self.cleaned_data['username']
        exists = models.UserInfo.objects.filter(username=username).exists()
        if exists:
            raise ValidationError('用户名已存在')
        return username

    def clean_email(self):
        email = self.cleaned_data['email']
        exists = models.UserInfo.objects.filter(email=email).exists()
        if exists:
            raise ValidationError('用户名已存在')
        return email

    def clean_password(self):
        pwd = self.cleaned_data['password']
        # 加密 & 返回
        return encrypt.md5(pwd)

    def clean_confirm_password(self):
        pwd = self.cleaned_data['password']
        confirm_pwd = encrypt.md5(self.cleaned_data['confirm_password'])
        if pwd != confirm_pwd:
            raise ValidationError('两次密码不一致')
        return confirm_pwd

    def clean_mobile_phone(self):
        mobile_phone = self.cleaned_data['mobile_phone']
        exists = models.UserInfo.objects.filter(mobile_phone=mobile_phone).exists()
        if exists:
            raise ValidationError('手机号已注册')
        return mobile_phone

    def clean_code(self):
        code = self.cleaned_data['code']
        # mobile_phone = self.cleaned_data['mobile_phone']
        '''
        bug处理，如果已注册用户重复注册
        提交数据无反应
        因前面mobile_phone已存在异常并未返回值
        故此处找不到mobile_phone
        加判断解决
        '''
        mobile_phone = self.cleaned_data.get('mobile_phone')
        if not mobile_phone:
            return code

        conn = get_redis_connection()
        # 通过手机号获取redis中对应的验证码
        redis_code = conn.get(mobile_phone)
        if not redis_code:
            raise ValidationError('验证码失效或未发送，请重新获取验证码')
        # redis_code为bin类型，进行decode转换成字符串
        redis_str_code = redis_code.decode('utf-8')
        if code.strip() != redis_str_code:
            raise ValidationError('验证码错误，请重新输入')
        return code



class SendSmsForm(forms.Form):
    mobile_phone = forms.CharField(label='手机号',validators=[RegexValidator(r'^(1[3|4|5|6|7|8|9])\d{9}$','手机号格式错误'),])

    def __init__(self,requset,*args,**kwargs):
        super().__init__(*args,**kwargs)
        self.request = requset

    def clean_mobile_phone(self):
        '''手机号校验的钩子函数'''
        mobile_phone = self.cleaned_data['mobile_phone']

        # 判断短信模板是否有问题
        tpl = self.request.GET.get('tpl')
        template_id = settings.TENCENT_SMS_TEMPLATE.get(tpl)
        if not template_id:
            raise ValidationError('短信模板有误')

        # 判断手机号是否已注册
        exists = models.UserInfo.objects.filter(mobile_phone=mobile_phone).exists()
        if tpl == 'login':
            if not exists:
                raise ValidationError('该手机号未注册')
        else:
            if exists:
                raise ValidationError('手机号已存在')

        code = random.randrange(1000,9999)
        sms = send_sms_single(mobile_phone,template_id,[code,])

        # 等于0的时候表示短信发送成功
        if sms['result'] != 0:
            raise ValidationError('短信发送失败,{}'.format(sms['errmsg']))

        # 验证码 写入redis (django-redis)
        conn = get_redis_connection()
        conn.set(mobile_phone, code, ex=60)


        return mobile_phone

class LoginSmsForm(BootstrapForm,forms.Form):
    mobile_phone = forms.CharField(label='手机号', validators=[RegexValidator(r'^(1[3|4|5|6|7|8|9])\d{9}$', '手机号格式错误'), ])
    code = forms.CharField(label='验证码', widget=forms.TextInput())

    def clean_mobile_phone(self):
        mobile_phone = self.cleaned_data['mobile_phone']
        exists = models.UserInfo.objects.filter(mobile_phone=mobile_phone).exists()
        if not exists:
            raise ValidationError('手机号已注册')
        return mobile_phone

    def clean_code(self):
        code = self.cleaned_data['code']
        mobile_phone = self.cleaned_data.get('mobile_phone')
        if not mobile_phone:
            return code
        conn = get_redis_connection()
        redis_code = conn.get(mobile_phone)
        if not redis_code:
            raise ValidationError('验证码失效或未发送，请重新获取验证码')
        redis_str_code = redis_code.decode('utf-8')
        if code.strip() != redis_str_code:
            raise ValidationError('验证码错误，请重新输入')
        return code

class LoginForm(BootstrapForm,forms.Form):
    username = forms.CharField(label='邮箱或手机号')
    password = forms.CharField(label='密码',widget=forms.PasswordInput(render_value=True))
    code = forms.CharField(label='图片验证码')

    def __init__(self,request,*args,**kwargs):
        super().__init__(*args,**kwargs)
        self.request = request

    def clean_code(self):
        '''钩子 校验验证码'''
        code = self.cleaned_data['code']
        # 去session获取自己的验证码
        session_code = self.request.session.get('image_code')
        if not session_code:
            raise ValidationError('验证码已过期，请重新获取')

        if code.strip().upper() != session_code.strip().upper():
            raise ValidationError('验证码输入错误')
        return code

    def clean_password(self):
        pwd = self.cleaned_data['password']
        # 加密 & 返回
        return encrypt.md5(pwd)